JPH08149728A - Terminal block for motor - Google Patents

Abstract

PURPOSE: To facilitate soldering work of lead wires by arranging a common terminal while shifting from the central position of two independent terminals thereby setting the distance between the common terminals shorter than the distance between other terminals for each spool when the terminal holding parts are mated. CONSTITUTION: Terminal pins 23a-23c are molded integrally with spools 19, 20 while embedding the base part in the terminal holding parts 22a-22c. Terminal pins 23a, 23c on the opposite sides are connected with one ends of two windings L1, L2 and L3, L4 wound around the spools 19, 20 whereas the central pin 23b is connected with the other ends of the windings. The terminal 23a is located in the center of the terminal holding part 22a, the central terminal pin 23b serving as a common terminal is located while being shifted toward the terminal 23a, and the terminal 23c is located while being shifted toward the opposite side by the same distance. When respective terminal holders 22 are mated, the distance Px between common electrodes 23b is shorter than the distance Py between other terminals and the Py is identical for all terminals. Since a single lead wire can be connected simultaneously with both common terminals, the workability can be enhanced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor terminal device for supplying electric power to the windings wound on each winding frame in a motor having a pair of winding frames wound with two windings. Regarding

[0002]

2. Description of the Related Art Conventionally, in a four-phase stepping motor or the like, windings L1, L2 and L for two phases (two windings) are used as a stator winding frame located on the outer circumference of a rotor, as shown in FIG.
A pair of winding frames W1 and W2, on which 3 and L4 are respectively wound, are arranged side by side in the rotation axis direction of the motor (see Japanese Patent Laid-Open No. 1-107631 etc.).

Also, in this type of motor, each reel W1,
W2 is molded from a thermoplastic synthetic resin, and as shown in FIG. 8, three terminal holding portions H11, H are formed at predetermined intervals on the facing surfaces of the reels W1, W2 facing each other.
Terminal pins P11, P12, P13, P21, P22 for projecting 12, H13 and H21, H22, H23, and for supplying power to the windings of the reels W1, W2 on the terminal holding portions H11-H23. ，
A terminal device in which P23s are respectively erected is used.

According to this type of terminal device, the terminal holding portions of each winding frame are inserted into the gaps of the other terminal holding portion at the time of assembling to the motor so that the terminal holding portions H11 to H23 are inserted. The reels W1 and W2 can be easily positioned by meshing with each other, and the terminal holding portions H
A total of six terminal pins P11 to P23 installed upright on 11 to H23
Can be arranged in a row at a predetermined interval, so that the six lead wires for power supply can be easily connected at one place, and wiring with an external device can be easily performed.

As shown in FIG. 9, each of the reels W1 and W2 is provided with three terminal holding portions.
Two windings L1, L2 and L3, L4 wound around W2
To individually control the energization,
This is because one end of 3, L4 can be used as a common terminal for power supply voltage application or grounding, but the other end must be independent. Conventionally, three terminal holding portions of each reel W1, W2 are provided. Of the terminals H11 to H13 and H21 to H23, the terminal pins P12 and P which are erected on the central terminal holding portions H12 and H22, respectively.
With 22 as a common terminal, each winding L1, L2 and L3, L4
Of the terminal holding parts H11, H13 and H2 on both sides.
Terminal pins P11, P13 and P2 which are erected on 1 and H23 respectively
The other ends of the windings L1 to L4 are individually connected to each other with 1, P23 as independent terminals. Therefore, according to the conventional device, as shown in FIG.
As shown in FIG. 5, energization / de-energization can be controlled for each of the windings L1 to L4 of the reels W1 and W2.

[0006]

By the way, when the motor is driven by individually controlling the energization of the windings L1 to L4 in this way, it depends on the driving method at that time, but in general,
As shown by the dotted line in FIG. 9, terminal pins P12 and P22, which are common terminals in each of the winding frames W1 and W2, are connected to each other, and a power supply voltage Vc is applied to the terminal pins P12 and P22 to individually connect the windings L1 to L4. By independently grounding the independent terminals P11, P13, P21, P23 sides through the switching elements S1, S2, S3, S4, the respective windings L1 to L4 are individually energized,
Often drives a motor. And in this case,
At the time of assembling the motor, the common terminals (terminal pins P12, P22) of the winding frames W1, W2 located at the center may be connected to each other, and the lead wire may be connected thereto.

However, conventionally, each terminal pin P11
To P23 are all arranged at equal intervals, and the intervals between these terminal pins are such that when the lead wires for power supply are soldered to the terminal pins P11 to P23, they are soldered to other terminal pins. Since the distance is set to a predetermined distance or more so that a bridge or the like does not occur, it is necessary to separately use a connecting lead wire or the like to connect the common terminal, and the connecting work is troublesome.

The present invention has been made in view of these problems, and has the three terminal pins respectively formed on the pair of reels as described above, and these terminal pins are arranged in a line when the motor is assembled. An object of the present invention is to make it possible to easily perform a work of soldering one lead wire to two central terminal pins that are common terminals in an arrayed terminal device.

[0009]

In order to achieve the above object, the present invention as set forth in claim 1, is characterized in that an annular bobbin wound with two windings is provided in the direction of the rotation axis of the motor. A terminal device for supplying electric power to windings wound on each winding frame, which is provided on motors arranged in parallel, wherein the opposite sides of the respective winding frames face each other. And three terminal holding portions capable of meshing with each other are projected at a predetermined interval, and terminal pins that are substantially orthogonal to the rotation axis direction are erected on each of the terminal holding portions in an outward direction of each winding frame. Of the three terminal holding portions of each winding frame, one end of two windings wound on each winding frame is connected together to the terminal pin erected on the central terminal holding portion. , The terminal pin is used as a common terminal, and the two terminal pins erected on the terminal holding portions on both sides have the other of the two windings. The terminal pins are connected to each other to make the terminal pin an independent terminal for each winding, and further, in each of the winding frames, the common terminal is eccentric to one independent terminal side from the center position of the two independent terminals. It is characterized in that the distance between the common terminals of each winding frame when the terminal holding portions are engaged is made shorter than the distance between the other terminals.

According to a second aspect of the present invention, in the motor terminal device according to the first aspect, each terminal holding portion is formed to have the same width, and each winding frame has the other terminal holding portion. They are projected at fixed intervals so that they can be fitted, and in each reel, each independent terminal is erected at a substantially central position of the terminal holding portions on both sides, and the common terminal is one independent terminal from the central position of the central terminal holding portion. It is characterized in that it is erected at a position eccentric to the side.

According to a third aspect of the present invention, in the motor terminal device according to the second aspect, among the terminal holding portions on both sides of which the independent terminals are erected on each reel, the common terminal is eccentric. In the terminal holding part on the side away from each other, the independent terminal is erected at a position eccentric to the side opposite to the common terminal from the center position of the terminal holding part, and the independent terminals of the reels are meshed when the terminal holding parts are engaged. The feature is that the distance of is further lengthened.

[0012]

In the terminal device according to the first aspect of the present invention, in each winding frame, one end of each of the two windings is connected to a terminal pin that serves as a common terminal, and the other end of each winding is connected to each other. It is arranged at a position eccentric to one terminal side from the center position of the terminal pins on both sides which become independent terminals.

Therefore, according to the present invention, the distance between the terminal pins (common terminals) at the center of each reel is shorter than the distance between the other terminals when the terminal holding portions of each reel are engaged with each other when the motor is assembled. When connecting one lead wire to both common terminals at the same time for applying a power supply voltage or grounding, for example, connecting the lead wire to one common terminal, By bridging the terminal and the other common terminal by soldering, or by bending the tip of the lead wire to bridge between both common terminals and connecting that part by soldering, the bridge between both common terminals It can be easily done by connecting lead wires and soldering once.
Workability when connecting lead wires can be improved.

According to another aspect of the terminal device of the present invention, the terminal holding portions are formed to have the same width, and the terminal holding portions are arranged at regular intervals so that the other terminal holding portion can be fitted into each winding frame. It is projected. In each winding frame, the independent terminals are erected at substantially the center positions of the terminal holding portions on both sides, and the common terminal is erected at a position eccentric to one independent terminal side from the center position of the central terminal holding portion. There is.

Therefore, according to the present invention, when the respective terminal holding portions are engaged with each other, the distance between the common terminals can be made shorter than the distance between the other terminals. The same effect can be obtained. Further, according to the present invention,
Since each terminal holding part is fitted in the gap between the terminal holding parts on the winding frame side, the relative positions of both winding frames can be firmly fixed simply by engaging the respective terminal holding parts. Positioning work of each reel can be easily performed.

Next, in the terminal device according to the third aspect, among the terminal holding portions on both sides on which the independent terminals are erected, the independent terminal is held by the terminal holding portion on the side on which the common terminal is separated. It is erected at a position eccentric to the side opposite to the common terminal from the center position of the part. Therefore, in the terminal device according to claim 2, the distance between the independent terminals of each winding frame when the terminal holding portion is engaged can be further increased, and in addition to the work of connecting the lead wires to both common terminals, It is also possible to improve workability when connecting the lead wires individually to the individual terminals.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 2 is a side sectional view of a step motor according to an embodiment of the present invention. As shown in FIG. 2, a step motor case 1 includes a frame portion 2 in which a metal plate is bent into a C-shaped tube, and a pair of ends fixed by welding or the like so as to cover both end openings of the frame portion 2. The plates 3 and 4 form a hollow shape. Then, on the inner surface side of the rear end plate 4, a synthetic resin for holding a bearing 6 that rotatably supports a motor shaft 11 fixed to the center of a rotor (rotor) 10 via a detent 11a. A bearing support plate 5 made of metal is attached. The bearing support plate 5 can be produced in one step by a process such as insert molding with the bearing 6 fitted in a mold.

On the other hand, a stator 9 is provided on the inner surface side of the front end plate 3.
Synthetic resin (for example, PB
T: polybutylene terephthalate) extends to the center of the radius and a spacer portion 12 is interposed. A bearing 13 that rotatably supports the motor shaft 11 is fixed to the center of the radius of the spacer portion 12. The rotor portion 10 is supported by the spacer portion 12 and the bearing support plate 5.
And the stator 9 side are electrically separated from each other. The bearings 6 and 13 are formed by impregnating a porous material with a lubricating oil, for example, by impregnating a lubricating oil after pressing an iron-based or copper-based powder material. .

As shown in FIG. 4, the rotor 10 has a cylindrical rotor body 25 made of a mixture of a hard synthetic resin material (for example, PBT: polybutylene terephthalate) and short glass fibers (glass fiber reinforced plastic). , Position the motor shaft 11 provided with the detent 11a,
5, a cylindrical magnet 26 having a large number of magnetic poles is located on the outer peripheral surface of 5, and these parts are integrally molded. Further, bearings 6, 13 are provided on both end surfaces of the rotor body 25.
At the position facing the end face of the thin-walled disk-shaped washer 2
7, 28 are also integrally formed. This washer part 27,
The synthetic resin material 28 is, for example, an acetal resin (a crystalline thermoplastic homopolymer produced by polymerization of formaldehyde) mixed with a chemical lubricant.

The stator 9 is, as shown in FIG. 3, a motor shaft 1
A pair of yokes 14, 15 and 1 provided alternately with a plurality of comb-shaped magnetic poles 18 extending in the axial direction along the circumferential direction.
6, 17 and the pair of yokes 14, 15 facing each other
And a winding frame 19, 20 positioned on the outer circumference of the yoke so as to be sandwiched between another pair of yokes 16, 17, respectively. The winding frames 19 and 20 are formed of thermoplastic synthetic resin in an annular shape, and the annular portion thereof is formed in a substantially U-shaped cross-section that is open in the circumferential direction. Further, the winding frames 19 and 20 are respectively wound with windings 21 made of two polyurethane wires which are windings L1 and L2 or L3 and L4 of respective phases, and one end of the winding 21 is wound. However, the three terminal pins 23 are erected on the terminal holders 22 integrally formed on the flange portions 19a, 20a of the winding frames 19, 20 facing each other.
Is wrapped around. Then, the outer surfaces of the facing flange portions 15a and 16a of the yokes 15 and 16 are aligned with each other so that the concavo-convex portions of the terminal holders 22 are meshed with each other, and the magnetic poles 18 of the pair of yokes 14, 15, 16 and 17 are aligned. By filling an electrically insulating hard synthetic resin material 24 in the gap between the inner peripheral surface of the winding frame 19 and the inner peripheral surface of the winding frame 19, 20, these parts are integrally fixed. The lead wires 8 for power supply are connected to the respective terminal pins 23.

Next, the shape of the terminal holder 22, which is the main part of the present invention, will be described. As shown in FIGS. 5 and 6, the terminal holder 22 includes a pair of reels 19, 2 respectively.
0 are formed integrally with the outer end surfaces of the flange portions 19a, 20a facing each other, and three terminal holding portions 22a, 2 are provided on the respective flange portions 19a, 20a so as to project at predetermined intervals.
2b, 22c, and terminal pins 23a, 23b, 23c, which are provided on each of the terminal holding portions 22a to 22c and which are substantially orthogonal to the rotation axis direction of the motor and are erected in the outer direction of each reel. There is.

The terminal holding portions 22a to 22c are formed in a rectangular parallelepiped and are arranged in a line. The widths and intervals (T1 to T5) in the arranging direction of the terminal holding portions 22a to 22c are the same as those of the other reel side when assembled to the motor. Are set so that they can mesh with each other. In this embodiment, T1 = T2 = T3 = T4 = T5,
At the time of meshing, the terminal holding portions 22a to 22 on the winding frames 19 and 20 side
c are fitted with each other without a gap so that the winding frames 19 and 20 can be firmly positioned with respect to each other.

The terminal pins 23a to 23c are connected to the reels 19,
At the time of molding 20, the base parts of the terminal pins 23a to 23c are embedded in the terminal holding parts 22a to 22c and are insert-molded to be integrally formed with the terminal holding parts 22a to 22c. In addition, the terminal pins 23a to 23c have their terminal holding portions 22a to 22c after the winding frames 19 and 20 are formed.
The base may be embedded in c. And
Out of these three terminal pins 23a to 23c, the terminal pins 23a and 23c on both sides are wound with windings 21 (L) formed of two polyurethane wires respectively wound around the reels 19 and 20.
1, L2 and L3, L4) are respectively connected to each other, and the center terminal pin 23b has each of these windings L1, L2 or L.
The other ends of L3 and L4 are connected. As a result, the terminal pins 23a and 23c on both sides are respectively connected to the windings L1, L2 or L3.
It serves as an independent terminal for controlling the energization of L4, and the central terminal pin 23b has each winding L1, L2 or L3, L4.
It becomes the common terminal of.

Then, as shown in FIG. 1A, among the three terminal pins 23a to 23c, the terminal pin 23 on the left side facing the flange portions 19a and 20a of the reels 19 and 20, respectively.
a is erected at the center position of the terminal holding portion 22a.
Further, the center terminal pin 23b, which is a common terminal, is located at the center position when the terminal holders 22 of the winding frames 19 and 20 are engaged with each other. T3) shown in FIG.
Position smaller than 1/2 of width Pa of 2b (Pb <Pa
/ 2) In other words, it is erected at a position eccentric to the terminal pin 23a side from the center position of the terminal holding portion 22b, and the right terminal pin 23c is opposite to the terminal pin 23b from the center position of the terminal holding portion 22c. On the side, it is erected at a position eccentric by the same distance as the eccentric distance of the terminal holding portion 22b of the terminal pin 23b.

Therefore, in each of the winding frames 19 and 20, the distance Pc between the terminal pin (independent terminal) 23a on the left side and the central terminal pin (common terminal) 23b facing the flange portions 19a and 20a is the central terminal pin. The distance Pd between the (common terminal) 23b and the right terminal pin (independent terminal) 23c becomes smaller, and as shown in FIG. 1B, when the terminal holders 22 are engaged with each other, the reels 19 , 20 side common terminal 23b distance Px is shorter than other terminal distances Py, and all other terminal distances Py are the same distance.

As described above, in this embodiment, when the terminal holders 22 of the reels 19 and 20 are engaged with each other, the distance Px of the terminal pin 23b, which is a common terminal in the terminal holders 22, becomes smaller than the distance between the other terminals. It is shorter than Py.
Therefore, as shown in FIG. 7, when one lead wire 8 is simultaneously connected to both terminal pins 23b for the purpose of applying a power supply voltage or grounding, the lead wire 8 is connected to both terminal pins 23b.
By arranging it between b and soldering, one lead wire can be connected to both terminal pins 23b at the same time,
Workability when connecting lead wires can be improved.

Further, the distance Py between terminals other than these common terminals is
Is set to a constant distance by shifting the standing position of the terminal pin 23c, which is one of the independent terminals, to the outside of the terminal holding portion 22c. Therefore, as compared with the conventional device in which all the terminal distances are set to be constant, the terminal distance Py is
Can be made longer, and the soldering work when connecting the lead wire 8 to each independent terminal can be easily performed.

Further, in this embodiment, in each terminal holder 22, the widths of the terminal holding portions 22a to 22c and their intervals (T
1 to T5) are all set to be the same, the terminal holders 22 can be firmly fixed to each other when the terminal holders 22 are engaged with each other, and the positioning work of both reels 19 and 20 can be easily performed.

In this embodiment, among the distances between the terminal pins when the terminal holders are engaged, all the terminals except the common terminal distance Px have the same distance (Py). However, the common terminal distance Px. If the distance between other terminals can be shortened, it is possible to achieve the intended purpose such that the lead wire can be easily connected to the two common terminals. Therefore, the distance between other terminals Py is not necessarily the same. There is no need for this. For example, the terminal pins 23a and 23c, which are independent terminals, may be provided upright at the center positions of the terminal holding portions 22a and 22c.

In this embodiment, the terminal holding portions 22a ...
Although the width of 22c and the intervals (T1 to T5) thereof are all set to the same value, it is sufficient if the terminal holders 22 can be engaged with each other and the common inter-terminal distance can be made shorter than the other inter-terminal distances during the engagement. Distance T2 between parts 22a-22b
Is the width T3 or more (T2 ≧ T3) of the terminal holding portion 22b inserted between them, and the distance T between the terminal holding portions 22b-22c.
4 is the width T1 or more (T4 ≧ T1) of the terminal holding portion 22a inserted between them, and the width (T1) of the terminal holding portions 22a to 22c (T1) within a range satisfying the condition that T4 ≧ T1.
~ T5) may be set to different values.

Furthermore, in the present embodiment, all (six) terminal pins 23 are arranged in a straight line when the terminal holder 22 is engaged.
It suffices that the individual terminal pins are arranged in a substantially straight line, and the terminal pins of each winding frame may be arranged alternately (so-called zigzag shape) at the time of meshing.

[Brief description of drawings]

FIG. 1 is a plan view showing a configuration of a terminal holder according to an embodiment.

FIG. 2 is a side sectional view of a step motor according to an embodiment.

FIG. 3 is an exploded perspective view of the stator of the embodiment.

FIG. 4 is a partially cutaway perspective view of a rotor and a stator of an embodiment.

FIG. 5 is a side view of the reel of the embodiment as viewed from the terminal holder side.

FIG. 6 is a perspective view showing a configuration of a terminal holder according to an embodiment.

FIG. 7 is an explanatory diagram showing a state where lead wires are attached to the terminal holder of the embodiment.

FIG. 8 is an explanatory diagram illustrating a configuration of a conventional terminal device and a lead wire attachment state.

FIG. 9 is an explanatory diagram illustrating a connection state between two windings wound around a pair of winding frames and each terminal.

[Explanation of symbols]

9 ... Stator 10 ... Rotor 11 ... Motor shaft 1
9, 20 ... Reel 19a, 20a ... Flange 21 (L1, L2, L
3, L4) ... Winding 22 ... Terminal holder 22a-22c ... Terminal holding part 23a-23c ... Terminal pin

Claims (3)

[Claims] 1. An annular bobbin wound with two windings,
A terminal device for supplying electric power to a winding wound on each winding frame, the terminal device being provided on a motor arranged in parallel in the rotation axis direction of the motor, wherein the facing surfaces of the winding frames face each other. Three terminal holding portions, which can be meshed with the other winding frame side, are provided at predetermined intervals, respectively, and terminal pins substantially orthogonal to the rotation axis direction are provided on each of the terminal holding portions. Of the two windings wound on each winding frame, the terminal pin standing on the outer side of the winding frame and standing on the center terminal holding part of the three terminal holding parts of each winding frame. The ends are connected together, the terminal pins are used as a common terminal, and the other ends of the two windings are connected to the two terminal pins erected on the terminal holding portions on both sides, respectively. The terminal pin is an independent terminal for each winding, and the common terminal is located at the center position of two independent terminals in each winding frame. A terminal device for a motor, which is arranged at an eccentric position on the other independent terminal side so that the distance between the common terminals of each winding frame when the terminal holding portion is engaged is shorter than the distance between the other terminals. . 2. Each of the terminal holding portions is formed to have the same width, and is projectingly provided at a constant interval into which the other terminal holding portion can be fitted in each winding frame, and in each winding frame, each independent terminal has both sides. 2. The common terminal is erected at a substantially central position of the terminal holding portion, and the common terminal is erected at a position eccentric to one independent terminal side from the central position of the central terminal holding portion. The terminal device of the described motor. 3. Among the terminal holding portions on both sides of which the respective independent terminals are erected in each reel, in the terminal holding portion on the side where the common terminal is distant from the eccentricity, the independent terminal is placed from the center position of the terminal holding portion. 3. The distance between the independent terminals of each winding frame at the time of meshing each terminal holding portion is further lengthened by erected at a position eccentric to the side opposite to the common terminal.
The terminal device of the motor according to.